SearchX is a metasearch engine. Which means, is does not have its own crawler, but is a "proxy" to existing engines. But if you happen to know if of engines it uses has a good index of fediverse profiles, it could work.
We've made some headway with ScraPy which then imports into Meilisearch. It appears that making a fediverse crawler and search doable in little time (weeks, or days). Open Source, off course.
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